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              <!-- note this first widget doesn't get setup in JS -->
<!-- everything is done declaratively via our data-widget attribute -->

<div class="widget standard fl bordered" data-widget="dateTime">
    <p class="widget-title">Declarative Widget</p>
    <div class="widget-body">
        <time data-time="date"></time>
        <time data-time="time"></time>

<div class="plugin widget fancy fl bordered">
    <p class="widget-title">jQuery Plugin Widget</p>
    <div class="widget-body">
        <time data-time="date"></time>
        <time data-time="time"></time>

<div id="object-widget" class="widget fancy large fl bordered">
    <p class="widget-title">Object Widget</p>
    <div class="widget-body">
        <a href="#" class="toggle-date">toggle date</a>
        <time data-time="date"></time>
        <time data-time="time"></time>



              body {
    font-family: sans-serif;

.fl {
    float: left;

.fr {
  float: right;

.bordered {
    border: 1px solid #333;

.large {
    font-size: 150%;

.widget {
    margin: 1em;
.widget-title {
    font-size: 1.2em;
    margin-bottom: 0.3em;
    padding: 0.8em;
    margin-top: 0;

.widget-body {
    padding: 1em;

.widget time {
    padding: 0.3em 0;
    display: block;

.widget.standard {
    box-shadow: 1px 1px 6px -2px #222;

.widget.standard .widget-title {
    color: white;
    text-shadow: 1px 1px 2px #000;
    border-bottom: 1px solid #333;
    background-color: red;

.widget.fancy {
	/* oooh fancy, rounded corners lol */
   border-radius: 0 0 0.4em 0.4em;

.fancy .widget-title {
  /* ahh fancy gradients */
	background: #7abcff; /* Old browsers */
	background: -moz-linear-gradient(top, #7abcff 0%, #60abf8 44%, #4096ee 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#7abcff), color-stop(44%,#60abf8), color-stop(100%,#4096ee)); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* IE10+ */
	background: linear-gradient(to bottom, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#7abcff', endColorstr='#4096ee',GradientType=0 ); /* IE6-9 */

.large .widget-body {
   padding-top: 0; 

.toggle-date {
   font-size: 0.5em;


// so first, we want to create a completely new scope 
// to work in, stops us polluting global namespace.
// we'll use a self-invoking function

// include semicolon to prevent issues if concatenating files

;(function($) {
    //// a contrived widget with a litle functionality

    // only constructors should begin with a capital letter!

    // plus constructors are awesome because all dependencies
    // get passed in, meaning we very easily unit test if need be :)

    function DateTimeWidget(elem) {
        this.$elem     = $(elem);
        this.$timeElem = this.$elem.find('[data-time="time"]');
        this.$dateElem = this.$elem.find('[data-time="date"]');

        this.timeTimer = null;
        this.dateTimer = null;


    // use a prototype because that way every instance of a DateTimeWidget
    // can be extended at once, by anyone, to add new functionality
    DateTimeWidget.prototype = {
        constructor : DateTimeWidget,
        // note use of $.proxy below!

        // this ensures that the callback is always executed
        // in the context of the object you specify - in this
        // case the widget itself.
        // all functions/fields are available without the need
        // for another variable, 's', or whatever :)

        hookupDate : function() {
            this.dateTimer = setInterval($.proxy(this.updateDate, this), 60000);
        hookupTime : function() {
            this.timeTimer = setInterval($.proxy(this.updateTime, this), 100);

        updateTime : function() {
            this.$timeElem.text(new Date().toLocaleTimeString());
        updateDate : function() {
            this.$dateElem.text(new Date().toDateString());
        hideDate : function() {
        showDate : function() {

    // also, latch onto something to expose to the wider world
    window.DateTimeWidget = DateTimeWidget;

    // while we're here, why not make it into 
    // a jQuery plugin?! why the hell not :)    
    // e.g. $(".my-widget").dateTimeWidget()
    $.fn.dateTimeWidget = function(option) {

        return this.each(function() {
            var $this = $(this),
                data  = $this.data("dateTimeWidget");
            // check if we'd already worked on this element
            // if not, new up a widget and store against the element
            if (!data) $this.data("dateTimeWidget", (data = new DateTimeWidget(this)));

            // if a string was passed a string
            // the intention is to call a method on the widget
            // e.g. $(".widget").dateTimeWidget("hideDate");
            if (typeof option === "string") data[option]();

    // we can go one step further again by hooking in a data API!
    // everything can then be set up purely declaratively from HTML
    // e.g. <div data-widget="dateTime"></div>
    // choose whatever naming convention you like
    $("[data-widget=dateTime]").each(function() {


// this is our initialisation script
// where everything on the page gets hooked up

;(function($) {
  var objectWidget  = new DateTimeWidget(document.getElementById("object-widget")),
      $pluginWidget = $(".plugin").dateTimeWidget();

    // we can then interact with the widget differently
    // depending whether working with jQuery plugin or directly with object object
    // so let's do something with our
    // object widget as well, just for proof :)
    // set up a click handler to toggle date
    // note $.proxy again to save writing out an anonymous function
    // NOTE: toggle() as used here has been removed from
    // jQuery 1.9+
    $.proxy(objectWidget.hideDate, objectWidget),
    $.proxy(objectWidget.showDate, objectWidget)



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